Falsely deducting points when already allocated

We are MVG gold members where we have accumulated points over the last 15 years. We have moved through the tiers and we now sit on gold status. My gripe is that we have had points deducted from our account even though we clearly requested that our last accommodation be deducted using points that were due to expire. I booked our weekend, 2nd to the 4th May using points that should be expiring, I have written proof of this on email and you can listen to the telephone recordings where I confirmed more than 5 times that our expiring points would be used. This is disgusting and unprofessional, we have worked damn hard to get to this status, which very clearly seems to mean nothing to a big company like sun international. We never get reminders, not even a sms notifying of points due to expire and when you make a request it goes on deaf ears. I need somebody to rectify this immediately and I want a full statement of my account and what the points were deducted for. It saddens me to think that an international company will rob their clients of their hard earned points, how many people actually check this and it goes unnoticed. I will be taking this further onto all social medias.